2008 LEXUS GX470 Electrical System Problems

I TRIED TO START MY CAR AND THE KEY WOULD NOT TURN IN THE KEY IGNITION, I NOTICED THAT THE STEERING WHEEL HADN'T LOCKED IN PLACE. I TRIED TWO OTHER KEYS AND FINALLY THE IGNITION TURNED AND THE CAR STARTED. I DROVE TO MY DESTINATION AND TURNED OFF THE CAR AND LOCKED THE DOORS. I WENT OUT TO RESTART THE CAR AND THE KEY WOULD NOT TURN IN THE IGNITION AGAIN. I CALLED LEXUS OF CONCORD AND THEY ADVISED ME TO BRING IT IN. I FINALLY GOT IT STARTED AND DROVE IT THE 15 MILES TO THE DEALERSHIP, AT THE END OF THE DAY I RECEIVED A CALL SAYING THAT I NEEDED A NEW IGNITION STARTER CYLINDER AND ALL THE KEYS NEEDED TO BE REPROGRAMMED TO MATCH THE NEW CYLINDER THEY WOULD INSTALL. IT WOULD TAKE A DAYS LABOR AND COST OF THE CYLINDER AND REPROGRAMMING. COST WAS $616.00. THEY...